<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div class="box1">一个盒子</div>
    <div class="box2">个人信息</div>
    <input type="text">
</body>
<style>
    .box1{
        width: 100px;
        height: 100px;
        background: pink;
        padding: 10px;
        border: 5px solid blueviolet;
        box-sizing: border-box;
    }
    .box2{
        width: 400px;
        height: 70px;
        background: royalblue;
        box-sizing: border-box;
        padding: 20px 0;
    }
    input{
        width: 100%;
        box-sizing: border-box;
        padding: 30px;
    }
</style>
</html>